After losing her beloved husband at a young age, Rena Hiiragi turns to his older brother for support, only for their relationship to take a forbidden turn. As he comforts the grieving widow, his touching grows increasingly intimate, and Rena begins responding despite herself. He tears her stockings and stimulates her crotch until her body stops obeying reason. Encouraged by her reactions, the brother-in-law pushes further. Desperate for comfort, Rena starts sucking his swollen cock. When he spreads her clean-shaven pussy and penetrates her, the pleasure is so intense that she grinds back on him, briefly forgetting her husband and losing herself in sex to escape the loneliness.